One man's constant is another man's variable

One man's constant is another man's variable

Alan Perlis, an American computer scientist known for his work in programming languages and software engineering, famously said, "One man's constant is another man's variable." This statement encapsulates the idea that what may be considered unchanging or fixed by one person can be seen as flexible or changing by another. In the context of programming and software development, this concept is particularly relevant.